How to add one perference into the settings option

under the settings ,it has alot of options for us to set, there are two ways to add some app into the setting perference.

 

 

1. write an app separating from the settings source code,it is an independent  app .

Just the inputmethod can do like this.

 

 

2. change the settings source code.

 

Today we talk about this way.

 

*****************************************************************

First ,you should add the activity that you want to write into the AndroidManifest.xml

 

Like

<activity android:name="ExampleSettings" android:label="@string/example_settin
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

            </intent-filter>
        </activity>

 

also add the layout that pressing the perference that you add .

under the /res/layout/  ,and  the add some item into strings.xml

 

************************************************************************

Second

add one perference into the exsit xml file

Like

<PreferenceScreen
        android:key="button_example_key"
        android:title="@string/example_settings"
        android:summary="set and get the example number">

    </PreferenceScreen>

 

 

 

 

add source java code under the exsit java file.

Like

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

init code>>>>>>>>>>>>>>>

private static final String BUTTON_EXAMPLE_KEY = "button_example_key";

private PreferenceScreen   mButtonExampleKey;

 

 

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

detect code>>>>>>>>>>>>

else if(preference == mButtonExampleKey){
                Intent intent_example = new Intent(this,ExampleSettings.class);
               intent_example.setAction(Intent.ACTION_MAIN);
               startActivity(intent_example);
                return true;
                }

 

 

mButtonExampleKey =(PreferenceScreen) prefSet.findPreference(BUTTON_EXAMPLE_KEY);